APA引文

(1991). International science and technology data update 1991. Washington: National Science Foundation.

Trích dẫn kiểu Chicago

International Science and Technology Data Update 1991. Washington: National Science Foundation, 1991.

MLA引文

International Science and Technology Data Update 1991. Washington: National Science Foundation, 1991.

警告：這些引文格式不一定是100％准確.